Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-06-23
Eur.Phys.J.A12:369-374,2001
Physics
High Energy Physics
High Energy Physics - Experiment
17 pages, 6 figures. Considerably expanded version accepted for publication in Eur. Phys. J. A; a discussion, 4 figures and se
Scientific paper
10.1007/s100500170016
The analysis of new experimental data, obtained at the Proton Linear Accelerator of INR, with the aim to search for supernarrow dibaryons in the $pd\to ppX_1$ and $pd\to pdX_2$ reactions is presented. Narrow peaks with an experimental width of 5 MeV at masses of 1904$\pm 2$, 1926$\pm 2$, and 1942$\pm 2$ MeV have been observed in missing mass $M_{pX_1}$ spectra. In the missing mass $M_{X_1}$ spectra, the peaks at $M_{X_1}=966\pm 2$, 986$\pm 2$, and 1003$\pm 2$ MeV have been found. The analysis of the data obtained leads to the conclusion that the observed peaks in $M_{pX_1}$ spectra are most likely supernarrow dibaryons, the decay of which into two nucleons is forbidden by the Pauli exclusion principle. An alternative interpretation of the spectra by assuming a decay of the supernarrow dibaryons in "exotic baryon states" with masses $M_{X_1}$ is discussed.
Fil'kov L. V.
Kashevarov V. L.
Konobeevski E. S.
Mordovskoy M. V.
Potashev S. I.
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